JPS5945878B2 - cryostat - Google Patents
cryostatInfo
- Publication number
- JPS5945878B2 JPS5945878B2 JP53043679A JP4367978A JPS5945878B2 JP S5945878 B2 JPS5945878 B2 JP S5945878B2 JP 53043679 A JP53043679 A JP 53043679A JP 4367978 A JP4367978 A JP 4367978A JP S5945878 B2 JPS5945878 B2 JP S5945878B2
- Authority
- JP
- Japan
- Prior art keywords
- inner tank
- cryostat
- gas
- shield plate
- radiation shield
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
- F17C3/02—Vessels not under pressure with provision for thermal insulation
- F17C3/08—Vessels not under pressure with provision for thermal insulation by vacuum spaces, e.g. Dewar flask
- F17C3/085—Cryostats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/014—Nitrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/05—Applications for industrial use
- F17C2270/0509—"Dewar" vessels
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Description
【発明の詳細な説明】
この発明はクライオスタット（超低温用容器）の改良に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a cryostat (an ultra-low temperature container).
第１図は従来のクライオスタット（ヘリウム用クライオ
スタット）の断面構成を示す図で、図中１は外槽、２１
、２２はアルミ蒸着マイラ等を反射材、ガラスペーパー
等をスペーサとして数拾層積ねてなる多層断熱材で、断
熱真空部を形成している。Figure 1 is a diagram showing the cross-sectional configuration of a conventional cryostat (helium cryostat), in which 1 is an outer tank, 21
, 22 is a multilayer heat insulating material made by laminating several layers of aluminum vapor-deposited mylar or the like as a reflective material and glass paper or the like as a spacer, forming an insulating vacuum section.
３は外槽１の内側に上記多層断熱材２、を介して設けら
れた輻射シールド板、４は冷却管、５は上記輻射シール
ド板３で囲まれた部分の内方に形成された内槽、６はこ
の内槽５に収納された超電導コイル、７は内槽５内に貯
蔵された液体ヘリウム、８は弁である。3 is a radiation shield plate provided inside the outer tank 1 via the multilayer insulation material 2, 4 is a cooling pipe, and 5 is an inner tank formed inside the part surrounded by the radiation shield plate 3. , 6 is a superconducting coil housed in the inner tank 5, 7 is liquid helium stored in the inner tank 5, and 8 is a valve.
点ａ、ｂおよびｃはそれぞれ温度測定点を指すもので、
点ａは内槽壁、点ｂは輻射シールド板３と内槽５との間
の多層断熱材２２中心部、点ｃは輻射シールド板３の各
部を指す。第２図はこれらの温度測定点ａ−ｃにおける
温度変化の状態を示すグラフで、図中ａ−ｃは上記温度
測定点ａ−ｃに対応する・ところで、一般にヘリウム用
クライオスタットの運転においては、内槽５を常温（３
００゜に）から液体ヘリウム温度（４．２゜に）に冷却
した後、内槽５に必要レベルまで液体ヘリウムＴを貯蔵
する。Points a, b and c each indicate temperature measurement points,
Point a indicates the inner tank wall, point b indicates the center of the multilayer insulation material 22 between the radiation shield plate 3 and the inner tank 5, and point c indicates each part of the radiation shield plate 3. Figure 2 is a graph showing the state of temperature change at these temperature measurement points a-c, in which a-c corresponds to the temperature measurement points a-c mentioned above.By the way, in general, in the operation of a helium cryostat, Keep the inner tank 5 at room temperature (3
After cooling from 00°) to liquid helium temperature (4.2°), liquid helium T is stored in the inner tank 5 to the required level.
しかしながら上述従来のクライオスタットは、輻射シー
ルド板３と内槽５との間が断熱真空状態であるため、こ
の部分の多層断熱材２２の中心部（点ｂ）の稠度平衡が
第２図に示すよう長時間を要する。このため安定状態で
行う必要のあるクライオスタットの熱的特性の測定、あ
るいは内部に収納した超電導コイル６等の静特性の測定
において長い待ち時間を必要とする等の欠点があつた。
この発明は上記のような欠点を除去するためになされた
もので、温度平衡時間を短縮したクライオスタットを提
供することを目的とする。以下第３図および第４図を参
照してこの発明の実施例を説明する。However, in the conventional cryostat described above, since the space between the radiation shield plate 3 and the inner tank 5 is in an adiabatic vacuum state, the consistency balance at the center (point b) of the multilayer insulation material 22 in this area is as shown in FIG. It takes a long time. For this reason, there were drawbacks such as a long waiting time being required when measuring the thermal characteristics of the cryostat, which must be carried out in a stable state, or when measuring the static characteristics of the superconducting coil 6 etc. housed inside.
This invention was made to eliminate the above-mentioned drawbacks, and an object thereof is to provide a cryostat with a shortened temperature equilibration time. Embodiments of the present invention will be described below with reference to FIGS. 3 and 4.
第３図はこの発明によるクライオスタットの一実施例を
示す断面構成図で、図中１〜８および点ａ−ｃはそれぞ
れ第１図と同様であり、、説明の重複を避けるために同
様の部分に同一符号を付した。９は輻射シールド板３と
内槽５との空間、換言すれば多層断熱材２２を有する部
分に封じ込まれた窒素ガス、１０はその封切弁である。FIG. 3 is a cross-sectional configuration diagram showing one embodiment of the cryostat according to the present invention, in which points 1 to 8 and points a to c are the same as in FIG. 1, and similar parts are shown to avoid duplication of explanation. are given the same reference numerals. Reference numeral 9 indicates nitrogen gas sealed in the space between the radiation shield plate 3 and the inner tank 5, in other words, the portion having the multilayer insulation material 22, and 10 indicates a shutoff valve thereof.
第４図は第２図と同様に温度測定点ａ〜ｃにおける温度
変化の状態を示すグラフである。すなわちこの発明は、
内槽５に貯蔵する液化ガス、ここでは液体ヘリウム７よ
り沸点の高いガスここでは窒素ガス９を輻射シールド板
３と内槽５との空間内に封じ込んだものである。このよ
うなクライオスタツトにおいて、いま、その冷却は従米
のクライォスタツトと同じ方法で行うものとすれば、内
槽５の温度が３０００Ｋ〜約５００Ｋの範囲では、輻射
シールド板３と内槽５との間の多層断熱材２２の中心部
の点ｂ（７）温度はその空間に封じ込められた窒素ガス
９の伝導、対流作用によつて容易に冷やされ、第４図に
示すように短時間でも５００Ｋ程度になる。Similar to FIG. 2, FIG. 4 is a graph showing the state of temperature change at temperature measurement points a to c. In other words, this invention
A liquefied gas stored in the inner tank 5, here a gas having a higher boiling point than liquid helium 7, here nitrogen gas 9, is sealed in the space between the radiation shield plate 3 and the inner tank 5. In such a cryostat, if cooling is performed in the same manner as in American cryostats, when the temperature of the inner tank 5 is in the range of 3000K to about 500K, the gap between the radiation shield plate 3 and the inner tank 5 is The temperature at point b (7) at the center of the multilayer insulation material 22 is easily cooled down by conduction and convection of the nitrogen gas 9 confined in that space, and as shown in Fig. 4, the temperature at point b (7) is about 500 K even for a short time. become.
その後、内槽５の湛度が４００Ｋ以下に下がれば、上記
空間の窒素ガス９はクライオポンプの作用によつて内槽
壁に固化吸着されてしまい、空間は１×１０１Ｔ０ｒｒ
以下の真空になる。このため従来のクライオと同等の断
熱効果を得ることができ、何ら弊害なく各部の渦度平衡
時間力吠きく短縮される（第４図参照）。なお、上述実
施例では内槽５に貯蔵する液化ガスが液体ヘリウム７で
、ヘリウム用クライオスタツトを例示し、封じ込むガス
を窒素ガス９として説明したが、これのみに限られず、
液化ガスが例えば液体水素、液体アルゴンで、封じ込む
ガスがこれらの液化ガスよリ沸点が高いガスであればア
ルゴン、酸素等であつてもこの発明を適用できることは
いうまでもない。After that, when the filling degree of the inner tank 5 falls below 400K, the nitrogen gas 9 in the space is solidified and adsorbed to the inner tank wall by the action of the cryopump, and the space becomes 1×101T0rr.
The vacuum becomes below. Therefore, it is possible to obtain a heat insulation effect equivalent to that of the conventional cryo, and the vorticity equilibrium time of each part is significantly shortened without any adverse effects (see Fig. 4). In the above embodiment, the liquefied gas stored in the inner tank 5 is liquid helium 7, the cryostat for helium is illustrated, and the gas to be sealed is nitrogen gas 9, but the present invention is not limited to this.
It goes without saying that the present invention can be applied to argon, oxygen, etc. as long as the liquefied gas is, for example, liquid hydrogen or liquid argon, and the gas to be enclosed has a higher boiling point than these liquefied gases.
以上述べたようにこの発明によれば、内槽５に貯蔵する
液化ガスより沸点の高いガスを輻射シールド板３と内槽
５との空間内に封じ込んだので温度平衡時間を大きく短
縮することができる。As described above, according to the present invention, since the gas having a higher boiling point than the liquefied gas stored in the inner tank 5 is sealed in the space between the radiation shield plate 3 and the inner tank 5, the temperature equilibrium time can be greatly shortened. Can be done.
従つてクライオスタツトの熱的特性の測定、あるいは内
部に収納した超電導コイル６等の静特性の測定における
待ち時間も大きく短縮することができるという効果があ
る。Therefore, there is an effect that the waiting time for measuring the thermal characteristics of the cryostat or the static characteristics of the superconducting coil 6 etc. housed inside can be greatly shortened.
第１図は従来のクライオスタツトの断面構成図第２図は
同上クライオスタット各部における混度変化の状態を示
すグラフ、第３図はこの発明によるクライオスタツトの
一実施例を示す断面構成図、第４図は同上クライオスタ
ット各部における温度変化の状態を示すグラフである。
１・・・・・・外槽、２１，２２・・・・・・多層断熱
材、３・・・輻射シールド板、５・・・・・・内槽、７
・・・・・・液体ヘリウム（液化ガス）９・・・・・・
窒素ガス（液化ガスよリ沸点の高いガス）。FIG. 1 is a cross-sectional configuration diagram of a conventional cryostat. FIG. 2 is a graph showing the state of mixture change in each part of the same cryostat. FIG. 3 is a cross-sectional configuration diagram showing an embodiment of the cryostat according to the present invention. The figure is a graph showing the state of temperature change in each part of the same cryostat. 1...Outer tank, 21, 22...Multilayer insulation material, 3...Radiation shield plate, 5...Inner tank, 7
・・・・・・Liquid helium (liquefied gas) 9・・・・・・
Nitrogen gas (a gas with a higher boiling point than liquefied gas).
Claims (1)
られた輻射シールド板と、この輻射シールド板で囲まれ
た部分の内方に形成された内槽と、上記輻射シールド板
と内槽との空間に設けられた多層断熱材とからなるクラ
イオスタットにおいて、内槽に貯蔵する液化ガスより沸
点の高いガスを上記空間内に封じ込んだことを特徴とす
るクライオスタット。 ２ 内槽に貯蔵する液化ガスがヘリウムガスであり、上
記空間内に封じ込むガスが窒素ガスである特許請求の範
囲第１項記載のクライオスタット。[Scope of Claims] 1. An outer tank, a radiation shield plate provided to the inner tank of the outer tank via an insulating vacuum section, and an inner tank formed inside the area surrounded by the radiation shield plate. and a multilayer insulation material provided in a space between the radiation shield plate and the inner tank, characterized in that a gas having a higher boiling point than the liquefied gas stored in the inner tank is sealed in the space. Cryostat. 2. The cryostat according to claim 1, wherein the liquefied gas stored in the inner tank is helium gas, and the gas sealed in the space is nitrogen gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53043679A JPS5945878B2 (en) | 1978-04-13 | 1978-04-13 | cryostat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53043679A JPS5945878B2 (en) | 1978-04-13 | 1978-04-13 | cryostat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54136415A JPS54136415A (en) | 1979-10-23 |
| JPS5945878B2 true JPS5945878B2 (en) | 1984-11-09 |
Family
ID=12670517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53043679A Expired JPS5945878B2 (en) | 1978-04-13 | 1978-04-13 | cryostat |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5945878B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59157200U (en) * | 1983-04-08 | 1984-10-22 | 三菱電機株式会社 | cryogenic container |
| JPS59172900U (en) * | 1983-05-07 | 1984-11-19 | 三菱電機株式会社 | cryogenic container |
| JPS60147000A (en) * | 1984-01-11 | 1985-08-02 | Mitsubishi Electric Corp | Cryogenic container |
| CN100357454C (en) * | 2005-07-01 | 2007-12-26 | 本溪冶炼集团有限公司 | Ferro-aluminium alloy with low carbon, low phosphor and low sulphur content for final deoxidizer in steelmaking |
| JP6619551B2 (en) * | 2014-09-30 | 2019-12-11 | 川崎重工業株式会社 | Dual structure tube for cryogenic fluid and dual structure storage tank for cryogenic fluid |
-
1978
- 1978-04-13 JP JP53043679A patent/JPS5945878B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54136415A (en) | 1979-10-23 |
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